Quarterly report pursuant to Section 13 or 15(d)

Credit Facility - Additional Information (Detail)

v2.4.0.8
Credit Facility - Additional Information (Detail) (USD $)
1 Months Ended 3 Months Ended
Jul. 31, 2013
Mar. 31, 2014
Dec. 31, 2013
Line of Credit Facility [Line Items]      
Credit facility outstanding   $ 117,143,000 $ 77,114,000
Outstanding borrowings   117,100,000 77,100,000
Pledge of investments in financing receivables   190,000,000 114,300,000
Issuance costs 8,700,000    
Weighted average short-term borrowing rate   2.50% 2.60%
Line of credit facility amortization period 60 month period from July 2013    
Fees for loan agreement description   Fees for each Loan Agreement equal to 0.50%, divided by 360, multiplied by the excess of the available borrowing capacity under each Loan Agreement over the actual amount borrowed under such Loan Agreement.  
Default underlying financings   50.00%  
Senior Secured Revolving Credit Facility [Member]
     
Line of Credit Facility [Line Items]      
Credit facility outstanding     350,000,000
Maximum advances on credit facilities     700,000,000
Qualifying Government and Institutional Loans (G&I Facility) [Member]
     
Line of Credit Facility [Line Items]      
Termination of credit facility   2018-07  
Description of credit facility   Continuing Guaranty dated July 19, 2013  
London Interbank Offered Rate   LIBOR plus 1.50%  
Floating interest rate   1.50%  
Qualifying Government and Institutional Loans (G&I Facility) [Member] | Credit Default Option [Member]
     
Line of Credit Facility [Line Items]      
London Interbank Offered Rate   LIBOR plus 2.50%  
Floating interest rate   2.50%  
Qualifying Government and Institutional Loans (G&I Facility) [Member] | U.S. Federal Government [Member]
     
Line of Credit Facility [Line Items]      
Applicable valuation percentages   80.00%  
Qualifying Government and Institutional Loans (G&I Facility) [Member] | Institutional [Member]
     
Line of Credit Facility [Line Items]      
Applicable valuation percentages   75.00%  
Qualifying Government and Institutional Loans (G&I Facility) [Member] | Federal Funds [Member]
     
Line of Credit Facility [Line Items]      
London Interbank Offered Rate   Federal Funds Rate plus 1.50%  
Floating interest rate   1.50%  
Qualifying Government and Institutional Loans (G&I Facility) [Member] | Senior Secured Revolving Credit Facility [Member]
     
Line of Credit Facility [Line Items]      
Credit facility outstanding     200,000,000
Maximum advances on credit facilities     400,000,000
Qualifying Project Finance Loans (PF Facility) [Member]
     
Line of Credit Facility [Line Items]      
Termination of credit facility   2018-07  
Description of credit facility   Limited Guaranty dated July 19, 2013  
London Interbank Offered Rate   LIBOR plus 2.50%  
Floating interest rate   2.50%  
Applicable valuation percentages   67.00%  
Qualifying Project Finance Loans (PF Facility) [Member] | Credit Default Option [Member]
     
Line of Credit Facility [Line Items]      
London Interbank Offered Rate   LIBOR plus 5.00%  
Floating interest rate   5.00%  
Qualifying Project Finance Loans (PF Facility) [Member] | Federal Funds [Member]
     
Line of Credit Facility [Line Items]      
London Interbank Offered Rate   Federal Funds Rate plus 2.50%  
Floating interest rate   2.50%  
Qualifying Project Finance Loans (PF Facility) [Member] | Senior Secured Revolving Credit Facility [Member]
     
Line of Credit Facility [Line Items]      
Credit facility outstanding     150,000,000
Maximum advances on credit facilities     $ 300,000,000